Some cases are totally unrealistic: there's no way anyone could possibly lose the amount of weight Kae Serinuma does in a week without surgical intervention, and Alvida's fat-removing Smooth-Smooth Fruit isn't something that exists in real life. Some are anime characters who lost weight, whether by hard work, happenstance, or magic. Most anime characters are on the thin side, but not all of them have always been that way.
